90 Bevision of British MoUusca. 



Distribution. Denmark [Murch), Christiania Fiord and 

 Lofoten Islands, 15-100 fath. (G. 0. Bars). 



Synonyms. Ckelia trilineata, M, Sars, and Trit )nia velata, 

 (Ersted. 



Fam. 10. HermaeidaB. 

 Genus 1. Herm^ea, Loven. 



108. Hermcea hijida (Montaguj. 



Plymouth [Garslanyj in litt.). 

 Distribution. Naples ( Cos^a) , Genoa {Trinchese) . 

 it is //. Hancocki^ Trinchese, and perhaps H. cruciatus, 

 Agassiz J it is also Physojnie union carneum,, Costa.. 



169. Hermcea dendritico.j Aid. & Hanc. 



Distribution. Naples {Costa), Genoa {Trinchese), Trieste 

 ( Graeffe) . 



It is If. brevicorms, lutescens, and orbicularis of Costa. 



Genus 2. Alderia, AUman. 



170. Alderia modesta {\^oy en). 



Distribution. Sweden {Loven). 

 Ir, is Alderia amphibia, Allman. 



D. Pellibranchiata. 



Fam 11. Elysiidae. 



Genus Elysia, Risso. 



171. Elysia viridis (Montagu). 

 Cumbrae and Plymouth {A. M. N.). 



Var. olivacea, Jeffreys. 



Distribution. Mediterranean {Marion &c.), Adriatic {Bergh 

 cC'c), ^gean {Forbes), Kiel {Meyer dD Mobius), Denmark 

 {Bergh), Sweden {Loven), Norway and Finmark, 0-10 fath. 

 (G. 0. Sars). 



